21115353055044 has 48 divisors (see below), whose sum is σ = 50105353132800. Its totient is φ = 6918999806496.

The previous prime is 21115353055039. The next prime is 21115353055067. The reversal of 21115353055044 is 44055035351112.

It is a junction number, because it is equal to n+sod(n) for n = 21115353054993 and 21115353055011.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33635467 + ... + 34257485.

It is an arithmetic number, because the mean of its divisors is an integer number (1043861523600).

Almost surely, 2^{21115353055044} is an apocalyptic number.

It is an amenable number.

21115353055044 is an abundant number, since it is smaller than the sum of its proper divisors (28990000077756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21115353055044 is a wasteful number, since it uses less digits than its factorization.

21115353055044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670032 (or 670030 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 21115353055044 in words is "twenty-one trillion, one hundred fifteen billion, three hundred fifty-three million, fifty-five thousand, forty-four".